Gas producer



(No Model.) 3 Sheets-Sheet 1;

- I111.1111111l GAS PRODUGER.

No. 517,271. P11-@mea Mar. 27, 1894.

(No Model.) a Sheets-sheen 2. E. J. DUFF. GAS PRODUCER. No. 517,271. Patented Mar. 27, 1894.

A F e. 2

. the dish being inclined upward to discharge UNITE STATES 'Armenien EDWARD JAMES DUFF, OF GLASGOW, SCOTLAND.

GAS-PRODUCER.

SPECIFICATION forming part of Letter s Patent No. 517,271,dated March 27, 1894.

Application led April 25, 1893. Serial No. 471,771. (No model.)

.To all whom t may concer-n.-

Be it known that I, EDWARD JAMES DUFF, a subject of the Queen of Great Britain and Ireland, and 'a resident of Glasgow, in the county of Lanark, Scotland, have invented an Improved Construction of Gas-Producer, of which the following is a specification.

.My said invention has for its object to diminish the cost of constructing a gas producer, to increase its efficiency and productiveness, and to render the quality of the combustible gas produced better and more uni- `form. The casing of my improved producer 1s rectangular and built of castiron ianged plates of simple and inexpensive form, lined with flrebrick. The air required for the combustion or gasification enters up among the coals from a bottom casing through perfo-y rated plates or gratings which are inclined up from the sides to a central angular ridge and which present a large surface through the perforations or openings in which the air is distributed so as to act with moderate current and without concentration but uniformly over the whole of the coals, the air spreading from the coals immediately over the gratings to the portions at the sides. The air is injected by means of one or more steam jets in the ordinary way. The coals are fed in in the ordinary way and the ashes or residues de-v scend freely between the casing and the sides of the producer into a shallow dish or trough extending under the producer, the bottom of openings at opposite sides, through which openings the ashes or residues are removed by means of rakes. The dish is filled with sufcient water to seal the bottom of the producer.

In the accompanying explanatory drawings, Figures 1, and 2, are vertical sections as at right angles to each other, and Fig. 3, is a horizontal section.

The structure, the interior of which forms the gas producer, is rectangular and consists of an external shell formed of a number of ilanged castiron side plates,'A, which are dat excepting the iianges, and may be made in the simplest and least costly manner, with the bolt holes for fixing the flanges together formed in the castings by means of cores, and requiring no machine finishing work.

The side plates, A, are lined with rebrick sides, B, which are surmounted bya slightly arched Iirebrick roof, C, and4 the whole covered by a castiron plate, D'. The coals are fed in through a hopper, E, at the center of the top, in connection with which hopper there may be arranged any suitable valvular or feeding mechanism of a kind already in use in such apparatus. Plugged holes, R, are provided in the roof for introducing pokers or stirring instruments. The gas produced passes off by a i'lue, F, at the middle of the top of one of the sides. At the bottom of the structure there is constructed of sheet iron and angle iron a dish or trough, G, of the width of the space between two of the sides of the structure, but elongated in the other direction so as to extend under and beyond the other two sides ot' the structure, which sides are supported across it by castiron gird ers, H. The ends of the dish or trough, G, whcre'they extend beyond the sides of the structure have their bottoms inclined or sloped upward and the ashes or coal residues are raked out at these ends of the dish or trough, G, this trough being filled with water to seal the bottom of the structure across the middle of the trough, G, a casing, J, is formed, having vertical side plates of castiron and a rigid roof with inclined sides, the middle part of which roof consists of perforated castiron plates or gratings, K, while the end parts are formed by unperforated plates, L. Between this casing and the walls of the producer opposite the longer sides of the casing, there is a free passage at the base of the inclined blowing surfaces for the ashes or residues to the ash trough, giving a continuous contact of the hot ashes and the water, and clearing the grate bars. In thus getting the ashes away from the blast the formation of clinkers is prevented. The air for combustion or gasification enters one end of the casing, J, by a pipe, M, from a steam blower, N, and, passing up through the perforated plates or gratings, K, is distributed throughout a large area among the coals so as to act uniformly and without concentration upon any small portion. As some ashes or residues may fall through the perforated plates or gratings, K, provision is made for removing them through a door, P, at one end of IOO the casing, J, and this casing has fixed across 1t an inner bottom, Q, which is inclined or sloped up toward the door, P, to facilitate the raking out of the ashes. VThe upward direction of the air entering from the gratings, K, among the coals, and its distribution over large area so as to move with a gentle current, are found to operate very advantageously and to rapidly produce large quantities of gas of good and uniform quality, so that the plant required for a large production of gas is comparatively small. The inclined positions of the gratings, K, is also very beneficial, as the residuary portions of the coals easily and regularly slide down the inclined surfaces without tendency to clinlier, While the narrowing lateral spaces correspond to the diminishing bulk of the materials and promote the gradual and uniform descent of the whole.

What I claim as my invention isl. A gas producer provided with a Watersealed bottom trough and a casing located in the lower portion of the producer provided with an inlet for air from a blower and with a cover of gratings inclined from the sides of the casing upward to a middle angular ridge, and free spaces between the said casing and the sides of the producer for the residues to pass from the gratings of the said casing to the water trough, substantially as and for the purposes set forth.

2. A gas producer of rectangular section provided with a water-sealed bottom trough and a transverse casing extending from side to side of the producer and across the center thereof the said casing being provided with an inlet for airfrom a blower, and with a cover having vertical openings therein, said cover being inclined upward from its opposite sides to a middle angular ridge, and free spaces on the opposite sides between the casing and the sides of the producer, all substantially as and for the purposes set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

EDWARD JAMES DUFF.

Witnesses:

EDMUND HUNT, GEORGE PATTERSON. 

